Loud speaker



Sept 23, 1930, F. l.. STINE LOUD SPEAKER Filed Jan. 7, 1929 Patented Sept. 23, 1930 UNITED` STATES PATENT OFFICE FRANK LINCOLN STINE, OF EAST RANGE, NEW JERSEY, AVSSIGNOR TO BEL'DING HEM- INWAY OMYANY, 0F N EW YORK, N. Y., A CORPDRATION OF GONNEGTICUT LOUD-SPEAKER Applicatoii'led January 7, 1529. Serial No.1,330 ,901.

This invention relates to loud speakers and has for its object tol provide a loud speaker with a fabric which will give a clear tone with a full .volume of sound.

Anotherobject of the invention is to provide a loud speaker with a. fabric having a silk face in which the gum of the silk is preferably present.

Still another object of the invention is to provide a loud speaker with a fabric having one face of cotton, the other face being of silk in which the gum of Vthe silk is prefer abl present.

:dditional objects will appear in the fol lowing specification in which the preferred form of the invention is described.`

ln the drawings similar reference characters refer to similar parts in all the views, in which Figure l is a front elevation showing a loud speaker' provided .with my improved fabric;

Figure 2 is a sectional view on the line .2-2fof Figure i; and

Figure 5 is. a transverse sectional view showing the fabric.

Various fabrics have been used in the past in loud speakers but the desired results have been impossible under lall conditions. In myv loud speaker a fabric is employed which gives unusually good results, both as to tone and as to sound volume. This fabric has a silk face, preferably containing the natural gum of the sillr, and preferably the fabric has one face of cotton, the other face being of silk in which the gum of the silk is present.

Silk and satin which are to be used in garments and for household purposes' are custon'iarily boiled or treated in some other Way to remove the gum of the sillr, this being necessary in. orner that the silk and satin may be empioyed for the purposes for whichI they have hitherto been used. 'in my loud speaker the gum of silk is preferably retained inthe fabricas it has been found that the gum of siilr important to obtainY the best resuits.

hile iced sp loudspeaker has a diaphragm frame 5 and an auxiliary diaphragm frame 6, my improved fabric being used in the large diaphragm 7 and alsoA in theauxiliary diaphragm 8. the diaphragm 7 and the auxiliary ldiaphragm 8 being connected by the driving pin 9 in the customary manner, this driviner pin 9 leading from the customary unit 10 w ich is preferably supported by means secured to the diaphragm frame 5.

Asbest shown in Figure 3 of the drawings, the diaphragms 7 or 8 are made from a fabric ll preferably having a siik face 12 with the other face preferably of cotton' 13.

The gum of the silk is preferably reta-ined in.

the silk face l2 of the fabric l1 as it has been found that the presence of the gum ofthe silk i is important in the fabric in order to obtain the best results. 1

It is immaterial whether the fabric is used "as the diaphragm with its silk face on the inner side and the cotton face on the outer side or whether the silk face is on theouter side,

and the cotton face is onl the inner side.

1 What l claim is:l l .1. A loud speaker having a frame and a fabric. secured to the frame, the fabric having one face ofcotton and the other face of Y' 5. A loud speaker haying a frame and a l fabric secured to the frame and constituting a diaphragm, the fabric `having one face of silk and the other face of another material.

\ FRANK LINCOLN STINE. 

